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Патент USA US3018903

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Jan. 30, 1962
Filed April 18, 1960
2 Sheets-Sheet 1
F l G. 4.
8’ ~ Q45»
Jan. 30, 1962
Filed April 18, 1960
2 Sheets-Sheet 2
_- , ' ‘
F l G. 3.
ited States Patent
Patented Jan. 30, 1962
arm 11 includes an enlarged portion 12 which receives
eccentric 13 on crank shaft 14. The latter is suitably
Richard N. White, 5317 Harcourt Ave.,
Los Angeles, Calif.
Filed Apr. 18, 1960, Ser. No. 23,023
11 Claims. (Cl. 209-441)
This invention pertains to a device for separating a
desired product from the ore in which it is found.
In placer mining it has long been the practice to pro
vide a riffle type arrangement in which the sand, gravel
or earth bearing gold or other precious metal is fed into
one end of an inclined rifde box. A series of transverse
supported by the frame, such as by bearing block 15,
and is driven by means of a pulley 216. A belt 17 inter
connects pulley 16 with drive pulley 18 supported on
shaft 19, likewise carried by the frame. A hand crank
20 is included to provide a ready means for rotating
pulley 18. It is obvious that rotation need not be manu
al, but can be provided by any suitable prime mover.
The source of power can be applied directly to shaft 14,
eliminating the belt drive.
As a result of this construction, when pulley 18 is
turned shaft 114 rotates eccentric 13 which causes trans
baffles, known as ri?les, are spaced along the length of
verse reciprocation of arm 11. This movement of drive
the ri?le box. Upon agitating the box, the precious 15 arm 11, reacting through bracket 9, causes the rif?e box
metal is intended to be collected at the base of the
5 to reciprocate transversely about its support from straps
ri?les, while the lighter gravel passes over the tops of
3 and 4 at the top of the frame. Thus, as the pulley 18
the ri?les and is removed. These devices, however, have
is turned, the ri?ie box is agitated through a short re
proved to be relatively inefficient in separating out the
ciprocative stroke.
gold or other metal. Also, their capacity is not great. 20
Mounted between'side plates 6 and 7 of the ri?ie box
In addition, they are not universal in nature, i.e., they
assembly 5 is a receptacle unit 21. This includes a
cannot be utilized as both wet and dry washers.
vIt is an object of the present invention to provide a
ri?le type ore concentrating device which has a high
bottom pan 22 and parallel sides 23 and 24, as well as
end walls 25 and 26. The longitudinal axis of the
receptacle unit is inclined, as best seen in FIG. 2, and
degree of efficiency in separating the desired product 25 preferably is made adjustable in its angle of slope. The
from the media in which it is found.
Another object of this invention is to provide an ore
concentrating device usable as either a wet or dry
upper end of the unit, adjacent end wall 25, is con
inclination of pan 22 may be controlled.
As may be seen in FIGS. 4 and 5, the pan 22 is sub
neeted to side walls 6 and 7 through pivot pins 28 and
29. Series of spaced openings 30 are provided through
walls 6 and 7 for receiving ‘bolts 31 and 32 which extend
A further object of this invention is to provide a ri?le 30 through the sides 23 and 24 of the receptacle assembly.
arrangement providing a feed from the hopper to the
By appropriate selection of the particular openings 30
ri?le box only during the time that the ri?le box is being
engaged by the bolts 31 and 32, it is apparent that the
Yet another object of this invention is to provide a
separating device of increased capacity.
A still further object of this invention is to provide
a separating arrangement having a ri?'le box tapered
toward the center of the pan and of the ri?les, this box
being provided with side openings to remove the tailings,
and central openings for receiving the separated product.
These and other objects will become apparent from
the following detailed description taken in connection
with the accompanying drawing in which:
FIG. 1 is an end elevational view of the device of this
FIG. 2 is an enlarged sectional view takenalong line
2--2 of FIG. 1',
35 stantially V-shaped in cross section, tapering toward its
longitudinal axis. Extending transversely across the
receptacle unit between the side walls 23 and 24, and
projecting upwardly from pan 22, are three riffles 33,
34 and 35. These members may be identical in form
and are spaced apart as indicated, dividing the receptacle
unit into separate chambers A, B and C. These rif?es
are V-shaped in plan, converging toward the center of
the ri?le box assembly and pointing downwardly along
the pan.
On the upper sides of the ri?les, and immediately ad
jacent thereto, are pairs of openings 36, 37, 38, 39, 40
and 41 which are adjacent also the side walls 23 and 24‘.
These openings, therefore, are located at the outer edges
FIG. 2 showing the ri?le box in elevation,
of the ri?les where the ri?les join the side walls. They
FIG. 4 is an enlarged transverse sectional view of the 50 provide communication with conduits 42 and 43 which
ri?le box taken along line 4-4- of FIG. 2, and
extend underneath the pan the length of the unit.
FIG. 5 is a fragmentary perspective view, partially in
Also immediately adjacent the rif?es on the upper sides
section, of the rif?e box removed from the remainder of
thereof are central openings 46, 47 and 48. These aper
the machine.
tures, therefore, are positioned at the apex of pan 22 and
The device of this invention includes a frame ‘1 made 55 at the apex of each of the V-shaped ri?les. This pro
up of suitable columns and beams providing an open
vides an axial outlet at the low point of each of the cham
sided structure that at the top portion carries a hopper
bers A, B and C. The central openings communicate
2. The latter element may be made vertically removable
with a central conduit 50, extending underneath the pan
from the framework. The top of the frame also carries
to its lower outlet end 51.
pairs of straps 3 and 4 which depend downwardly and
Provision is made to close the apertures 46, 47 and 48,
at their bottom ends support a ri?le box assembly 5.
this being accomplished by means of an elongated sheet
These straps, which may be made of sheet metal, thin
metal slide 52 held by guides 53 and 54 to the bottom pan
strips of wood, or the like, do not engage the other por
surface. Apertures 55, 56 and 57 extend through slide
tions of the machine of this invention but are free to
65 52. Therefore, with the slide 52 in the position indi
move in a horizontal direction.
cated in FIG. 2, the openings 55, 56 and 57 are remote
The riifie box assembly includes a pair of side sheet
from the apertures 46, ‘47 and 48 in the pan. This closes
members 6 and 7, the bottom edges of which are inter
the latter apertures so that there is no communication
connected by transverse member 8. A bracket 9 is
from the pan to conduit 50. However, by grasping handle
secured to member 6 and extends downwardly there
from. Pivotally connected to bracket 9 by means of 70 portion 58 and moving slide 52 upwardly, the openings
in the slide may be caused to register with the openings
pin 10 is one end of transverse arm 11 of the actuating ,
through the pan, permitting material from the central
mechanism for the device. The other end of transverse
FIG. 3 is a sectional view taken along line 3-—3 of
portion of the pan immediately above each of the ri?‘les
to drop into conduit 50.
The bottom portion of hopper 2, as may be seen in FIG.
2, includes funnel sections 60, 61 and 62 leading to out
lets 63, 64 and 65. These outlets communicate in turn
with tubular members 66, 67 and 68 which extend down
wardly to inclined outlet portions 69, 70 and 71 that
collected at the central portion of the pan back of each
riifle, slider 52 is moved upwardly from the position FIG.
2 to bring its openings into registry with openings 46, 47
and 48 through the pan.
In this manner, the gold, or
other separated material, drops into and is removed
through conduit 50, being collected in a suitable con
tainer located at the lower end 51 thereof. Thus, the
design of this invention facilitates the removal of the
metal from the rif?e box.
It should be observed, in addition, that the provision of
three inlets to the rif?e box greatly increases the capacity
of the unit. No longer is it necessary to have but a single
lead to the chambers A, B and C of the ri?le box. The
exit openings of tubular sections 69, 70 and 71 are closely
spaced from the upper surface of the pan. These outlets
from the feed tubes 66, 67 and 68 also are positioned so
as to be at the upper ends of the chambers A, B and C,
inlet and to cause the ore to pass over a series of riilles
spaced well above the rif?es at the lower ends of these
running down the length of the rifl‘le box. ‘In the example
In order that the feed tubes may bear the proper rela 15 illustrated, the capacity of the device is tripled over that
of the usual unit. It is obvious that there may be pro
tionship to the ri?le pan, and that the exits will be closely
vided additional rif?es and more feed tubes as desired.
spaced from the upper surface of the pan in all instances,
It is, of course, apparent that the inclinations given to
it is preferred to make these feed tubes removable. This
the pan may be selected as desired, depending upon the
permits the insertion of feed tubes of the proper length
particular ore involved. The device of this invention,
no matter what inclination is given to pan 22. Therefore,
therefore, allows the use of the best angle of the ri?le
the tubes 66, 67 and 68 are mounted in a slidable plate
pan for any ore that may be encountered.
73, which is held by guides 74 and 75 and positioned
The device of this invention is usable equally well either
against stop 76 when fully inserted. A handle 77 is in
as a dry or a wet separator, which is unlike conventional
cluded to facilitate movement of member 73. Therefore,
if the inclination of the receptacle unit should be altered 25 designs that must be employed as one or the other, but
are not devised for universal applicability.
from that shown in FIG. 2, member 73 will be slid out
For the wet separation, the device includes a tank 80 of
wardly and replaced with a similar unit having tubular
rectangular construction removably held to the side of the
frame by support 81 and bracket 82. At the bottom por
In using the device of this invention, the slide 52 is 30 tion of tank 80, valves 83, 84 and 85 are provided to which
are connected short hoses 86, 87 and 88. Therefore, by
positioned to close the apertures 46, 47 and 48 through
controlling the valves, water may be caused to run into
the center of the pan. The ore, which typically may be
the pan above each of the ri?les. The valves may be
gold-bearing gravel, is introduced into hopper 2 in any
adjusted to cause any desired rate of flow. This permits
quantity desired. This gravel willtend to run down into
tubes 66, 67 and 68. However, due to the positioning of 35 close control of the moisture of the ore being re?ned, and
allows the unit to operate under optimum conditions for
the outlets of these tubes close to the upper surface of pan
maximum e?iciency of separation.
22, the gravel will not immediately flow from these tubes.
From the foregoing, it is apparent that I have provided
Next, the ri?le box assembly is agitated by rotating pulley
an improvedore separating device having the advantages
18. This reciprocative movement allows the gravel to
of increased ef?ciency, automatic ‘feed, and operation as
slowly feed from the tubes 66, 67 and 68 onto the pan
either a wet or dry separator. This is made possible by
above each of the rif?es. ‘In this manner, a proper feed
the particular design of the ri?le pan and the rif?es, in
of the ore is attained which takes place only when the
conjunction with the central openings for removing the
riffle box is agitated.
heavier substance, while the lighter tailings are caused to
As the ore is moved back and forth in the pan by the
exit through side apertures.
movement of the ri?le box, the tailings, being the lighter
The foregoing detailed description is to be clearly under
constituent; move outwardly toward the sides 23, and
stood as given by way of illustration and example only,
24 of the receptacle unit. At the same time, the heavier
the spirit and scope of this invention being limited solely
gold particles, having greater inertia, tend to remain sta
by the appended claims.
tionary at the axis of the rif?e box as the agitation takes
I claim:
place. The convergent form of the pan surface facilitates
1. An ore concentrating device comprising a receptacle
the movement of the heavier particles downwardly to the
having a bottom surface inclined with respect to the hori
central axis. However, the pan has a relatively shallow
zontal plane, side walls projecting upwardly from either
angle which does not interfere with the outward move
side of said bottom surface, and a plurality of partitions
ment of the tailings. Therefore, by being V-shaped in
projecting upwardly from said bottom surface and extend
contour and recessed at the center, the ri?le pan greatly
ing transversely across said receptacle in spaced relation
improves the separation of the gold from the ore.
ship with each other, said bottom surface being inclined
The con?guration given the ri?les likewise assists in
downwardly toward the longitudinal central portion there
this action. The heavier gold particles will tend to col
of, said partitions being inclined toward the central por
lect at the central lower portions of the V-shaped ri?les,
while the lighter tailings move outwardly along the rif?es 60 tions thereof and arranged to point downwardly, said bot
tom surface having a closable aperture in said central
to their outer edges.
members of different lengths to again locate the exits
therefrom closely adjacent the upper surface of the pan. ’
As the agitation of the riffle box takes place, the tailings
that are forced to the sides enter openings 36, 37, 38, 39,
portion thereof adjacent and above each of said partitions,
said bottom surface further having a side outlet above
40 and 41, and are carried away through conduits 42 and
each of said partitions adjacent the intersection of the
43. This is contrary to the usual construction in which 65 side wall thereof and the partitions, said bottom surface
no side openings are provided and the tailings are in
being continuous other than at said apertures and con
tended to move over the tops of the ri?les. Thus, ac
duit means for receiving material from said side apertures
cording to the provisions of this invention, there is both
and from said central apertures.
an automatic feed of ore into the ri?le box, and an auto
2. A device as recited in claim 1 in which for closing
matic disposal of the tailings through the side outlets. 70
said closable apertures there is provided a slidable mem
While this takes place, the gold or other substance being
ber beneath said bottom surface of said pan, said slidable
re?ned is collected at the central portion of the pan, and
member having a plurality of apertures therethrough
spaced to register with said central apertures through said
rated out in this manner.
After a quantity of the heavier substance has been 75 bottom surface when said slideris in one position, said
virtually all of the heavier metal particles will be sepa
slider being movable to a position of nonregistry with said
apertures in said bottom surface.
3. A device as recited in claim 1 including, in addition,
means for introducing material into said receptacle on
said bottom surface above each of said partitions.
4. A device as recited in claim 3 in which said means
for introducing material into said receptacle includes a
plurality of conduits, each of said conduits having an out
let adjacent and closely spaced from said bottom surface
of said pan at the longitudinal center of said pan.
5. A device as recited in claim 1 including, in addition,
means for introducing a ?uid into said receptacle above
each of said partitions.
6. An ore separating device comprising a support frame,
a receptacle carried by said ‘frame, means for transversely
reciprocating said receptacle, said receptacle having side
walls and further having a continuous bottom pan con
means from said hopper comprises a plurality of tubular
members, each of said tubular members having an outlet
opening closely spaced from said pan so as to transmit
material only upon said transverse reciprocation of said
9. A device as recited in claim 8 including in addition
means ‘for varying said inclination of said axis, and in
which said tubular members are removable for permitting
the use of tubular members of different lengths as deter
mined by said inclination.
10. An ore separating device comprising a receptacle
member having an inclined bottom surface and spaced
sidewalls, said bottom surface being inclined inwardly to
wards the longitudinal axis thereof, and at least one par
tition extending transversely across said receptacle mem
ber ‘from one side to the other and projecting upwardly
from said bottom surface, said partition being inclined to
Ward said longitudinal axis of said receptacle, said bottom
surface including an outlet adjacent each of said sidewalls,
vergent toward the longitudinal axis thereof, said axis being
inclined with respect to the horizontal plane, a plurality
of spaced partitions projecting upwardly vfrom said pan 20 said outlets being adjacent and on the upper sides of the
and extending transversely of said receptacle interconnect
ends of said partition, said bottom surface further includ
ing said side walls so as to divide said receptacle into a
plurality of chambers, each of said partitions being in
clined downwardly from said side walls toward the longi
ing a closable outlet spaced from said ?rst mentioned
outlets and positioned at said longitudinal axis adjacent
and on the upper side of the central portion of said par
tudinal axis of said pan, said pan being provided with an 25 tition.
aperture therethrough on the upper side of each of said
partitions adjacent the intersection of the baf?es and the
side walls, and an additional aperture therethrough spaced
from said ?rst mentioned apertures and adjacent the upper
side of each of said partitions at the longitudinal axis of
said pan, conduit means beneath said pan for receiving
material from said ?rst mentioned apertures, conduit
means for receiving material from said second mentioned
apertures, and means for selectively closing said second
mentioned apertures.
7. A device as recited in claim 6 including in addition
a hopper, and conduit means interconnecting said hopper
and each of said chambers for conducting material from
said hopper to said chambers.
8. A device as recited in claim 7 in which said conduit 40
11. A device as recited in claim 10 in which said bottom
surface is substantially V-shaped in transverse section, and
in which said partition is substantially V-shaped in top
References Cited in the ?le of this patent
Josse ________________ __ Dec. 1,
Wild __________________ __ Oct. 6,
Bartlett ______________ .._ Nov. 17,
Neuhaus _____________ .. July 17,
Great Britain _______________ __ of 1891
Great Britain __________ .._ July 21, 1954
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